AD9283(1999) データシートの表示（PDF） - Analog Devices
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AD9283 Datasheet PDF : 12 Pages
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AD9283
EXPLANATION OF TEST LEVELS
Test Level
I 100% production tested.
II 100% production tested at +25°C and sample tested at
specified temperatures.
III Sample tested only.
IV Parameter is guaranteed by design and characterization
testing.
V Parameter is a typical value only.
VI 100% production tested at +25°C; guaranteed by design
and characterization testing for industrial temperature
range; 100% production tested at temperature extremes for
military devices.
Step
255
•
•
128
127
•
•
0
Table I. Output Coding (VREF = +1.25 V)
AIN–AIN
0.512
•
•
0.002
–0.002
•
•
–0.512
Digital Output
1111 1111
•
•
1000 0000
0111 1111
•
•
0000 0000
PIN CONFIGURATION
PWRDWN 1
20 D0 (LSB)
VREF OUT 2
19 D1
VREF IN 3
18 D2
GND 4
17 D3
VD 5 AD9283 16 GND
A IN
6
TOP VIEW
(Not to Scale)
15
VDD
AIN 7
14 D4
VD 8
13 D5
GND 9
12 D6
ENCODE 10
11 D7 (MSB)
Pin Number
1
2
3
4, 9, 16
5, 8
6
Name
PWRDWN
VREF OUT
VREF IN
GND
VD
AIN
7
10
11–14, 17–20
15
AIN
ENCODE
D7–D4, D3–D0
VDD
PIN FUNCTION DESCRIPTIONS
Function
Power-down function select; Logic HIGH for power-down mode (digital outputs go to
high impedance state).
Internal Reference Output (+1.25 V typ); Bypass with 0.1 µF to Ground.
Reference Input for ADC (+1.25 V typ).
Ground.
Analog +3 V Power Supply.
Analog Input for ADC (Can be left open if operating in single-ended mode, but recom-
mend connection to a 0.1 µF capacitor and a 25 Ω resistor in series to ground for better
input matching).
Analog Input for ADC
Encode Clock for ADC (ADC samples on rising edge of ENCODE).
Digital Outputs of ADC.
Digital output power supply. Nominally +2.5 V to +3.6 V.
–4–
REV. B
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